Deleting application cache programatically


Is it possible to clear application cache through javascript other than searching for and deleting the file? For eg, I found a post which mentions caching can be cleared in mozilla in the following way,

// invalidates the cache manifest
var mani = "http://.../mysite.manifest"; // manifest URL
Components.classes[";1"] .getService(Components.interfaces.nsIApplicationCacheService).getActiveCache(mani).discard();

What would be the best way to achieve the same in rho elements?